M3.2 earthquake 14 km W of Challis, Idaho
A magnitude 3.2 earthquake struck 14 km W of Challis, Idaho on Sat, Mar 18, 1978, 7:33 PM MST (02:33 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M4.1 25 km NNE of Lowman, Idaho. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.2 (ml), minor
- Local time
- UTC
- 1978-03-19 02:33:47 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 44.496° N, 114.418° W
- Region
- Idaho
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
- Stations used
- 9
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.125 km NNE of Lowman, Idaho · 17716 days ago · 5 km deep · 89 km away
- 3.130 km NE of Sun Valley, Idaho · 17682 days ago · 5 km deep · 69 km away
Before
Earthquakes todayIdaho earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000tff. Read Tue, Sep 22, 2026, 8:21 PM UTC.